[Fat Charlie]

I really liked the "price chart" idea:


With gas at $3.50 and driving 12,000 miles a year,
at 15 mpg you're spending $2800 a year on gas.
at 20 mpg you're spending $2100 a year on gas.
at 25 mpg you're spending $1680 a year on gas.
at 30 mpg you're spending $1400 a year on gas.
at 35 mpg you're spending $1200 a year on gas.
at 40 mpg you're spending $1050 a year on gas.

and then something along the lines of:
Paying attention to how you drive can really add up!